Basement membranes are specialized extracellular matrix structures, found in all metazoans, that are believed to function in several important developmental processes, including; cell adhesion, cell migration, cell differentiation, and morphogenesis. Basement membranes are also thought to be involved in certain pathologic conditions, such as tumor metastasis, wound healing, blistering diseases of the skin, and certain forms of nephritis. Knowledge of the functions of basement membranes has been derived primarily from studies of purified basement membrane components, no genetic studies of basement membrane function have been performed. One of the most abundant and ubiquitous components of basement membranes is the basement membrane-specific type IV collagen. The recent identification of mutations in the genes that encode the two type IV collagen chains in the nematode Caenorhabditis elegans provides the first opportunity for genetic analyses of basement membrane functions.
The aim of this application is to pursue both genetic and molecular analyses of basement membrane structure and function in C. elegans. The powerful genetic and molecular analyses that are possible in C. elegans, and its simple, well defined anatomy, make it an excellent system for studying the structure and functions of basement membranes. Multiple independent mutations in the type IV collagen genes will be generated and their effects on the development of C. elegans will be determined by a combination of microscopic and molecular analyses. the nucleotide and amino acid sequence alterations caused by these mutations will be determined and will provide value information towards defining functionally important regions of the type IV collagen molecule. Genetic loci that interact with the type IV collagen genes will be identified, since they are likely to encode other basement membrane components. Such interacting loci may encode known basement membrane components, such as laminin, entactin, or the heparan sulfate proteoglycan core protein, or could encode previously unidentified components of basement membranes. Mutational analyses of interacting loci will also define the regions within different proteins that physically interact loci will also define the regions within different proteins that physically interact to form basement membranes. The genetic analyses possible in C. elegans will provide a better understanding of both the structure and functions of basement membranes.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Project (R01)
Project #
5R01HD027211-08
Application #
2838750
Study Section
Pathobiochemistry Study Section (PBC)
Program Officer
Moody, Sally Ann
Project Start
1990-09-01
Project End
2002-11-30
Budget Start
1998-12-01
Budget End
1999-11-30
Support Year
8
Fiscal Year
1999
Total Cost
Indirect Cost
Name
Northwestern University at Chicago
Department
Anatomy/Cell Biology
Type
Schools of Medicine
DUNS #
005436803
City
Chicago
State
IL
Country
United States
Zip Code
60611
Ihara, Shinji; Hagedorn, Elliott J; Morrissey, Meghan A et al. (2011) Basement membrane sliding and targeted adhesion remodels tissue boundaries during uterine-vulval attachment in Caenorhabditis elegans. Nat Cell Biol 13:641-51
Muriel, Joaquin M; Xu, Xuehong; Kramer, James M et al. (2006) Selective assembly of fibulin-1 splice variants reveals distinct extracellular matrix networks and novel functions for perlecan/UNC-52 splice variants. Dev Dyn 235:2632-40
Johnson, Robert P; Kang, Seong Hoon; Kramer, James M (2006) C. elegans dystroglycan DGN-1 functions in epithelia and neurons, but not muscle, and independently of dystrophin. Development 133:1911-21
Sherwood, David R; Butler, James A; Kramer, James M et al. (2005) FOS-1 promotes basement-membrane removal during anchor-cell invasion in C. elegans. Cell 121:951-62
Inoue, Takao; Sherwood, David R; Aspock, Gudrun et al. (2002) Gene expression markers for Caenorhabditis elegans vulval cells. Mech Dev 119 Suppl 1:S203-9
Inoue, Takao; Sherwood, David R; Aspock, Gudrun et al. (2002) Gene expression markers for Caenorhabditis elegans vulval cells. Gene Expr Patterns 2:235-41
Ackley, B D; Crew, J R; Elamaa, H et al. (2001) The NC1/endostatin domain of Caenorhabditis elegans type XVIII collagen affects cell migration and axon guidance. J Cell Biol 152:1219-32
Kang, S H; Kramer, J M (2000) Nidogen is nonessential and not required for normal type IV collagen localization in Caenorhabditis elegans. Mol Biol Cell 11:3911-23
Kramerova, I A; Kawaguchi, N; Fessler, L I et al. (2000) Papilin in development; a pericellular protein with a homology to the ADAMTS metalloproteinases. Development 127:5475-85
Gupta, M C; Graham, P L; Kramer, J M (1997) Characterization of alpha1(IV) collagen mutations in Caenorhabditis elegans and the effects of alpha1 and alpha2(IV) mutations on type IV collagen distribution. J Cell Biol 137:1185-96

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